Soot blower



Jan. 6 1926.

L. J. BAYER SOOT BLOWER Filed Jan. 4. 1924 2. Sheets-Shoot 1 W r R- m nM 0 6 M T n w .9

SN Q @n Hiiorvqcg L. J. BAYER 500T BLOWER Jan. 26 1926;

Filed Jan. 4, 1924 2 Sheets-Shoo; 2

Patented Jan. 26, 1926.

UNrrEn s'rara 1,571,039 PATENT GFFHTZE- LEO JOHN BAYER, OF ST. LOUIS,MISSOURI.

SEO! BLOVJER.

Application filed January 4, 1924. Serial No. 684,361.

1 '0 all whom it may concern:

Be it known that I, LEO JOHN'BAYER, a citizen of the United States,residing at St. Louis, State of Missouri, have invented certain new anduseful Improvements in Soot Blowers, of which the following is aspecification. 1

My invention has relation to improvements in soot blowers for boilersand consists in the novel features of construction more fully set forthin the specification and pointed out in the claims.

The present invention is an improvement over that shown in theco-pending application on soot blowers by Frank A. Bayer and myself onOct. 29, 1923, Serial No. 671,471, and is a novel departure therefrom inthat the steam supply valve is automatically released so that it mayclose if the operator releases the operating chain. Inthe presentinvention it is also the object to provide independent means for openingthe supply valve and rotating the blower unit, so that the valve may becompletely opened before the blower unit is moved. In the present sootblowers of this type, called valve-inhead blowers. as soon as the valveis operated the blower unit begins to rotate, or has already begun, withthe result that for a part of the units rotation the valve is onlypartially opened. As an alternative evil to having the valve onlypartially open for a part of the blowing arc of the blower unit, thevalve may be arranged to open before this are is reached and stay openuntil after the blowing arc is passed with the resulting waste of steamor injury to the boiler.

In the present invention the valve is fully opened before the blowerunit begins to revolve and at the same time the valve is free to closeat any time should the operator for some reason release the operatingchain. Thus the valve is entirely independent in its operation from theblower unit. The obvious advantage of having the valve closeautomatically should the operators attention be called'a'way whileblowing the boiler, is that the steam is immediately cut ofi, thuspreventing waste and injury to theboiler.

The 'manner 'of accomplishing this object as well as other advantages ofthe invention will fully appear from the following detailed descriptionof the invention in connection with "accompanying drawings, in whichigure 1 isa sideelevation of my an proved'blower shown applied to aboiler,

parts being in section; Fig. 2 is an enlarged top plan of the blowerhead; Fig. 3 is an enlarged vertical cross-section of the blower headtaken on the line 33 of Fig. 1; Fig. et is a further enlarged section ofthe valve operating mechanism in the position it assumes for opening thevalve; F 5 is an end elevation of the mechanism shown in Fig. 4; Fig. 6is a cross-sectional detail taken on the line 66 of Fig. 4:.

Referring to the drawings, W represents the boiler wall and T the boilertubes which it is desired to clean. The complete blower comprises ablower unit or element consist-- ing of a blower pipe 1 surrounded bythe usual jacket or air pipe 2, a head 3, and a steam supply pipe 4:connected to a valve casing 5 forming a part of the head. The blowerpipe 1 has a plurality of jet nozzles 1 distributed along its length. Inmounting the blower on the boiler, the boiler wall is first providedwith an opening 0 and a wall sleeve 6 is fitted tightly into thisopening, said sleeve having a flange 6 on the outer end into the cornersof which is bolted a supporting bracket 7 for the blower head 3. Theblower unit is passed through the sleeve 6 and is supported from theboiler tubes by suitable hangers 8. Since this invention is directedexclusively to the blower head 3 the balance of the specification willbe restricted to a description of this head.

The head 3 comprises a valve casing 5, and a steamchamber 9communicating therewith, and the valve and blower unit actuatingmechanism to be described hereinafter.

The steam chamber 9 is provided with an enlarged cylindrical portion 10for receiving the intake end of the blower pipe 1, a stuffing box 11being provided to make the connection steam tight and at the same timepermitting the blower pipe to rotate in the cylindrical enlargement 10.

The construction of the valve 12 is the same as that shown in theapplication above referred to and will not be, described herein indetail 1101' claimed.

The ,valve op erating mechanism comprises cooperating cam members 13 and14: respectively, the former being slidingly mounted on a shaft 15 andfeathered tosaid shaft by a feather 16, the shaft in turn being mountedat one end in a bearing 17 1nojecting from the cylindrical portion 19 ofthe steam chamber 9, and the latter cam member being provided with a hub18 through "which passes the opposite end of said shaft 15, said hubbeing mounted in a bearing 19. formed at the end of a bracket armprojecting from the housing 9 of steam chamber 9 The bracket arm 20 hasan extension 21' extending beneath the cam members the end o-t' which isprovided with a fork 22 in which a bell-crank lever 23 is mounted, theupwardly extending arm or which bears against the inner face of cammember 13 and the horizontally extending arm being engaged by theoperating stein 210i valwe 12. The cylindrical part 13 of cam member 13is n'ovided with teeth 25 which together with a spring-presserjl pin 26which normal ly rests in a space between two adjacent teeth, form a sortof escapement mechanism. The pin 26 is mounted in a lug 27 whichprojects from the housing of chamber 9.

A worm 28 is keyed to shaft, Lijand, meshes with a gear, wheel- 29-securedon. the blpwer pipe 1, and an operating wheel 30 is keyed lo theouter end of shaft 15 A driving chain 31 passes over the operating wheel30. The cam member 1.4 is hollow and. has a lug 32 formed on its end.wall 141 said lug being angularly spaced from a pin. 33 on the shaft 15when the blower head is at rest (Fig. 3). However, when the operatorrotates the wheel 30 the cam member 141 will be rotated in the directionof the arrow (Fig. 6) and the lug 32 will approach the pin 33 on theshaft 15-. At the same time the cam member 13 will be pressed inwardlyby cam '14 rocking the bell-crank 23 and. depressing valve stem 2 1 toopen the valve 12 and admit steam to the steam chamber 9 and blowerpipe 1. By the time the valve is fully open the cam 13 isin the positionshown in Fig. -1- and the pin 26 has been forced out of engagement withthe teeth 25 onto the smooth surface or of the cam thus permitting thecam. to rotate with shaft 15 which is now about to be driven by the lug32 which has moved into engagement with pin 33. Since the cam members 13and 14; now rotate with the shaft 15 as a unit the valve 12 will remainopen, and the worm 28 will drive gear wheel 29 to rotate the blower pipe1 through its blowing arc. The blowing arc is defined by blocks 34, 35set in slots 36 formed on the periphery of a collar. 37 secured on the.blower pipe 1, said blocks impinging on stop member 38 formed on thelink 39 connecting the head 3 with the bracket 7.

Should the chain 31 break or the operator take his hands from it duringthe blowing operation it is desirable that the valve 12,

close automatically to prevent waste of steam. This is accomplished bythe spring 40 on shaft 15 between cam member 13 and pinion 28. When thecam member is moved inwardly to open the valve 12 the spring iscompressed, and if tension is taken oil the cam member at this timethe'sprin'g will force said cam back to its position of rest (l ig. andpermit the valve 12 to close.

Having described myinvention, I claim:

1. In a soot blower for boilers, a rotatable blower unit, a steam supplypipe therefor, a valve for controlling the supply of steam to the blowerunit, means for rotating the blower unit, meansv associated therewithfor opening said valve, and means for automatically acting. on valveopening means, when said. blower rotating means are released, to permitvalve to close. in a soot bldiier. tor boilers, a rotatable blower,unit, a steam supply pipe. therefor, a valve for cont-Idling the supply.of steam to the blower u'nit,'a pan-"cream members in cooperativerelatien, one of said cam members o] erating to open said. valve and theother cam member operating to. rotate the bltiwer unit, aptuatingmeansior the cam members, and means operating automatically to pfilimitthe valveto clos'e oni releasin g the aptuating means. i l I I 3; In asoot. blower. for boilers, a rotatable blower unit, a. steam supply pipethere lior, afvalve for controlling the supply of steam to the blowerunit, ajdrive shaft adapt ed to rotate. the blowe1:.unit, a cam membermennted loosely on said shaft, ineans for, rotating said cam member, asecond cam member mounted on said shaft and adapted to be movedlongitudinally, on said shaft, on

rotating the first cam member, means for holding the second cam memberagainst rotation relative to the shaft during its movement therealong,suitable connections between the second cam member and valvefor openingthe valve during the longitudinal movement. of said cam member,complementary driving. means on the first cam member and sliaft'adaptedto come into operatire, engagement after the second. cam member hasreached the limit of its movement, and means for restoring the secondcam member toitsnormal position on releasing the rotating means of thefirst cam member.

4. Ina soot blower for boilers, a rotatable lower pipe, a steam supplypipe therefor, a valve for controlling the supply of steam to the blowerpipe, a blower-rotating shaft, suitable driving connections between saidshaft and blower pipe, a main actuating cam and a valve-actuating camassociated therewith, means. for. rotating through a. given are the mainactuating cam to move the valve-actuating cam and open said valve, meansfor holding the blower rotating shaft against movement while the valveis being opened, and cooperating means between the main actuating camand blower rotating shaft for actuating said shaft after the valve. hasbeen opened.

In testimony whereof I hereunto, afiix my,

signature.

LEO JNQ. BAYER;

